Refugia

Planting refuge around Bt Cotton is mandatory as par Bt Protocol. Non Bt cotton is recommended as refugia in India. Helicoverpa Armigera, or the American bollworm, has other than cotton, a number of alternative host crops like chickpea, pigeonpea, tomato, sunflower, maize and sorghum, which can also be planted. Refuge crops must be planted in close proximity to the cotton plant.